At the same time, reduce the diameter of the rolling body in order to reduce the centrifugal force.
同时，减小滚动体的直径，以降低其离心力。
The average radial clearance, body clearance diameter of the external channels and rolling direction.
平均径向间隙，外部渠道和全身清除直径轧制方向。
The average radial clearance, body clearance diameter of the external channels and rolling direction.
平均径向间隙，外部渠道和全身清除直径轧制方向。
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